Na emulsified asphalt, uru pH nwekwara mmetụta ụfọdụ na ọnụego demulsification. Tupu ị mụọ mmetụta pH na ọnụ ọgụgụ demulsification nke emulsified asphalt, a na-akọwa usoro nkwụsị nke anionic emulsified asphalt na cationic emulsified asphalt n'otu n'otu.

Cationic emulsified asphalt demulsification na-adabere na ụgwọ dị mma nke nitrogen atom na otu amine na nhazi kemịkalụ nke emulsifier asphalt ka ọ bụrụ mmekọ na ụgwọ ọjọọ nke nchịkọta. Ya mere, mmiri dị na emulsified asphalt na-apụ apụ ma gbanwee. Emechala mkpochapụ nke emulsified asphalt. N'ihi na ntinye nke pH na-edozi acid ga-eme ka mmụba nke ụgwọ dị mma, ọ na-ebelata nchikota nke ụgwọ dị mma nke emulsifier asphalt na-ebu na mkpokọta. Ya mere, pH nke cationic emulsified asphalt ga-emetụta ọnụego demulsification.
Eja na-adịghị mma nke emulsifier anionic n'onwe ya na anionic emulsified asphalt na-ejikọta ya na ụgwọ ọjọọ nke mkpokọta. Demulsification nke anionic emulsified asphalt na-adabere na nrapanye nke asphalt n'onwe ya na mkpokọta iji kpochapụ mmiri ahụ. Anionic asphalt emulsifiers na-adaberekarị na ikuku oxygen ka ọ bụrụ hydrophilic, na ikuku oxygen na-eme ka njikọ hydrogen na mmiri, na-eme ka ikuku nke mmiri na-ebelata. A na-eme ka mmetụta nke njikọ hydrogen dịkwuo elu n'okpuru ọnọdụ acid ma na-ebelata n'okpuru ọnọdụ alkaline. Ya mere, ka pH dị elu, ka ọnụ ọgụgụ demulsification na-adị nwayọọ na anionic emulsified asphalt.